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Java Interview Questions: - 25 Basics interview questions on Java?

  • What if the main method is declared as private?
  • What if the static modifier is removed from the signature of the main method?
  • Can we define private and protected modifiers for variables in interfaces?
  • Can there be an abstract class with no abstract methods in it?
  • What modifiers are allowed for methods in an Interface?
  • What is a local, member and a class variable?
  • What does it mean that a method or field is “static”?
  • Is null a keyword?
  • What modifiers may be used with an inner class that is a member of an outer class?
  • What is class path?
  • What is path?
  • What is the difference among JVM Spec, JVM Implementation, JVM Runtime?
  • What are JDK and JRE?
  • What is JIT?
  • What is a JVM heap?
  • What is sandbox?
  • What is Locale?
  • What is a ResourceBundle class?
  • How will you get the platform dependent values like line separator, path separator, etc?
  • How does garbage collector decide which objects are to be removed? Can garbage collector be forced?
  • What is the final keyword denotes w.r.t class, method and variable?
  • What are the methods in Object?
  • Can you instantiate the Math class?
  • What is the difference between the instanceof and get class, these two are same or not?
  • Can main method be declared final?

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Author:
Shivprasad Koirala
We conduct training for Java/J2EE technologies like design patterns, J2EE, Struts, Hibernate, Spring, Rich Interface etc. and likes to write articles on the same in free time.
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